Furnace operation in the substitution boiler for the Novocherkassk GRES 300 MW power unit while burning anthracite culm-natural gas mixture

2006 ◽  
Vol 53 (6) ◽  
pp. 423-427
Author(s):  
V. A. Dvoinishnikov ◽  
V. P. Knyaz’kov ◽  
V. A. Galkov ◽  
A. N. Bezgreshnov ◽  
G. I. Kalmykov ◽  
...  
Keyword(s):  
Natural Gas ◽  
Power Unit ◽  
Furnace Operation ◽  
Gas Mixture ◽  
Anthracite Culm

Composition of Mixtures of Natural Gas Components Determined by Raman Spectrometry

1980 ◽  
Vol 34 (4) ◽  
pp. 411-414 ◽  
Author(s):  
Dwain E. Diller ◽  
Ren Fang Chang
Keyword(s):  
Natural Gas ◽  
Mole Fraction ◽  
Gas Mixtures ◽  
Spectrometric Method ◽  
Gas Mixture ◽  
Raman Intensity ◽  
Raman Spectrometry ◽  
Intensity Measurements ◽  
Hydrocarbon Gas ◽  
Related Line

The feasibility of using Raman spectrometry for determining the composition of mixtures of natural gas components was examined. Raman intensity measurements were carried out on eight, gravimetrically prepared, binary gas mixtures containing methane, nitrogen, and isobutane at ambient temperature and at pressures to 0.8 MPa. The repeatability of the molar intensity ratio, ( I2/ y2)/( I1/ y1), where y1 is the concentration of component 1 in the mixture, and I1 is the intensity of the related line in the mixture spectrum, was examined. The compositions of two gravimetrically prepared methane-nitrogen-isobutane gas mixtures were determined spectrometrically with an estimated precision of about 0.001 in the mole fraction. Typical differences from the gravimetric concentrations were less than 0.002 in the mole fraction. The Raman spectrum of a gravimetrically prepared, eight component, hydrocarbon gas mixture was obtained to show that the Raman spectrometric method has potential for being applicable to natural gas type mixtures.

AccurateP−ρ−TData and Phase Boundary Determination for a Synthetic Residual Natural Gas Mixture

2011 ◽  
Vol 56 (4) ◽  
pp. 826-832 ◽  
Author(s):  
Diego E. Cristancho ◽  
Ivan D. Mantilla ◽  
L. Alejandro Coy ◽  
Andrea Tibaduiza ◽  
Diego O. Ortiz-Vega ◽  
...  
Keyword(s):  
Natural Gas ◽  
Phase Boundary ◽  
Gas Mixture ◽  
Boundary Determination

Thermodynamic Rationale for Using Expander-Compressor Gas Turbine Power Unit

2021 ◽  
pp. 166-184
Author(s):  
A.S. Strebkov ◽  
A.V. Osipov ◽  
S.V. Zhavrotskiy
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Power Unit ◽  
Thermal Cycle ◽  
Turbine Unit ◽  
Negative Impact ◽  
Excess Pressure ◽  
Electricity Production ◽  
Gas Turbine Unit ◽  
Energy Potential

Natural gas is transported through a network of main gas pipelines under high pressure, and the process of its consumption requires a decrease in pressure of gas laid mainly in throttling devices. It is beneficial to use part of the available energy potential of natural gas for electricity production by means of expander-generator technologies. However, the task of finding ways to increase the capacity and efficiency of gas turbine power units using the energy of excess pressure of natural gas does not lose its relevance. The study poses and solves the problem of developing a new thermal cycle diagram of a combined power unit to substitute throttling pressure regulators at gas distribution stations with an expander-compressor gas turbine unit. A distinctive feature of the unit is the replacement of the gas turbine drive of the air compressor with its drive from the turbo-expander by using the energy of excess pressure of natural gas. This results in significant increase in the absolute thermal efficiency and decrease in the specific fuel and energy costs. We developed analytical dependencies relating the operating parameters of the expander-compressor gas turbine unit and its output characteristics. Thus, it was possible to find an approach to calculating the unit, the approach being based on proven methods for thermal cycle calculation. The results of the performed calculations show that, in comparison with gas turbine units, the expander-compressor gas turbine unit has a significantly lower specific consumption of equivalent fuel and a lower negative impact on the environment

Development of Knudsen thermal force for mass analysis of CH4/He gas mixture

2019 ◽  
Vol 30 (01) ◽  
pp. 1950002 ◽  
Author(s):  
Mostafa Barzegar Gerdroodbary ◽  
D. D. Ganji ◽  
Mohammad Taeibi-Rahni ◽  
B. Pruiti ◽  
Rasoul Moradi
Keyword(s):  
Natural Gas ◽  
Gas Sensor ◽  
Direct Simulation Monte Carlo ◽  
Low Pressure ◽  
Rectangular Domain ◽  
Gas Mixture ◽  
Micro Gas Sensor ◽  
High Order Equation ◽  
Helium Gas ◽  
Simulation Monte Carlo

Natural gas is known as the main source of energy and also contains significant and noble gases. Numerous researches have been performed to present novel methods for the detection and analysis of natural gas. In this study, Direct Simulation Monte Carlo (DSMC) method is used to evaluate the performance of a new micro gas sensor (MIKRA) for detection of helium in CH4/He gas mixture. In this sensor, the temperature difference of two arms inside a rectangular domain at low-pressure condition induces a Knudsen force which is proportional to physical properties of the gas. In order to define flow feature of a low-pressure gas inside the micro gas actuator, high order equation of Boltzmann is used to attain high precision results. To solve these equations, DSMC approach is used as a robust method for the non-equilibrium flow field. The effects of main factors such as length and gap of arms are comprehensively investigated in different ambient pressures. Furthermore, the effect of various concentrations of the CH4/He gas mixture on force generation is comprehensively studied. Our findings show that value of generated Knudsen force significantly different when the fraction of He in CH4/He gas mixture is varied. This indicates that this micro gas sensor could precisely detect the concentration of Helium gas inside a low-pressure CH4/He gas mixture.

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